Odissi is one of the eight classical dance forms of India. It originates from the state of Odisha, in eastern India. It is the oldest surviving dance form of India on the basis of archaeological evidences. The classic treatise of Indian dance, Natya Shastra, refers to it as Odra-Magadhi. 1st century BCE bas-reliefs in the hills of Udaygiri (near Bhubaneshwar) testify to its antiquity. It was suppressed under the British but has been reconstructed since India gained independence.